What does a rear master cylinder rebuild kit include?

This Bikers Choice kit includes the essential internal components needed to rebuild your rear master cylinder. You'll find seals, springs, and other small parts necessary to restore its function.

What symptoms indicate I need a rear master cylinder rebuild kit?

Common signs include a spongy or soft rear brake pedal, a brake lever that pulls all the way to the handlebar, or visible fluid leaks from the master cylinder itself. These issues suggest the internal seals or components may be worn out.

Are there any special tools required for installation?

While this is a direct replacement kit, rebuilding a master cylinder typically requires basic hand tools and a clean workspace. Refer to your motorcycle's service manual for specific installation procedures and any specialized tools that may be recommended.

Specifications

Brand: Bikers Choice
Part #: 601531
UPC: 887337429267

Bikers Choice L87-17 Big Twin (Exc.08-Up FLH/FLT) L87-03 XL Rear Master Cyl Rbld Kit H-D 42382-87C

Name: Bikers Choice L87-17 Big Twin (Exc.08-Up FLH/FLT) L87-03 XL Rear Master Cyl Rbld Kit H-D 42382-87C
Brand: Bikers Choice
SKU: bikers-choice-bikers-choice-l87-17-big-twin-exc-08-up-flh-flt-l87-03-xl-rear-mas-t14-603009
Price: 86.18 USD
Availability: BackOrder

$86.18

On Backorder — Expected to ship by May 23, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Bikers Choice rear master cylinder rebuild kit for many Harley-Davidson Big Twin and XL models. Restores smooth, reliable rear brake performance.

Key Features

Fits many Harley-Davidson Big Twin (excluding 2008-up FLH/FLT) and XL models.
Direct fit OE replacement for worn or leaking rear master cylinders.
Restores smooth and reliable rear brake performance.
Includes seals, springs, and internal components for a complete rebuild.

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About this part

Product Details

This rear master cylinder rebuild kit from Bikers Choice contains the internal components needed to renew your brake system. It's designed as a direct OE replacement, meaning it aims to restore the original function and feel of your master cylinder. If your rear brakes have become spongy, weak, or are leaking fluid, this kit can help get them back to performing reliably.

Inside this kit, you'll find the necessary seals, springs, and other internal parts to properly rebuild your master cylinder. This is a common service item for many Harley-Davidson Big Twin and XL models, especially as they age. By replacing these worn internal parts, you can expect to regain consistent stopping power and a firmer pedal feel, which is crucial for safe operation.

This kit is intended for a wide range of Harley-Davidson motorcycles, including many Big Twin models (excluding 2008 and later FLH/FLT) and XL models. Always confirm fitment for your specific year and model to ensure you get the right parts for your bike.